Site	No of used substr.	
	mean	s.d.
AuP	82.45	10.72
Wal	81.50	9.77
Sko	69.60	14.91
he	84.48	9.65
		
	Substrate diversity	
	mean	s.d.
AuP	3.862	0.354
Wal	3.795	0.311
Sko	3.500	0.426
he	3.870	0.277
		
	Substrate evenness	
	mean	s.d.
AuP	0.8772	0.0775
Wal	0.8626	0.0524
Sko	0.8275	0.0693
he	0.8730	0.0451
